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V 70 Class A

Owner's Manual

English

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Summary of Contents for V 70 Class A

Page 1: ...V 70 Class A Owner s Manual English...

Page 2: ...d insights into the interaction of amplifier and loudspeaker With tube amplifiers in particular a general reluctance to depart from the classic circuit designs has not done the technology any favors A...

Page 3: ...4...

Page 4: ...onnections 16 6 Advanced functions 18 6 1 Power Selector alternative output tubes 18 6 2 Protection 19 6 3 Soft Start 19 6 4 Ecomode 20 6 5 Front Channel 21 6 6 Regulated preamplifier output Pre Out 2...

Page 5: ...6...

Page 6: ...across the entire frequency response up to maximum modulation The enormous power with up to 70 watts of music power is significantly above the output level of conventional Class A amplifiers and is m...

Page 7: ...out only by a qualified technician Defective fuses should also only be re placed by a qualified technician Always replace fuses with ones of the same type and rating If your amplifier requires servici...

Page 8: ...le materials gases or vapors Avoid areas where there may be heavy accumulations of dust or where the unit may be subject to mechanical vibration Place your OCTAVE amplifier on a stable level surface 2...

Page 9: ...mote control 1 x 2 5 mm Allen key for removing the cover Owner s manual with warranty card Cloth and gloves 3 2 Removing the grille Procedure For your own safety make sure that the amplifier is not co...

Page 10: ...an of components and tubes by protecting against stresses caused by high inrush currents when switching on Procedure Check that the Ecomode switch on the rear panel is in the Eco off position Connect...

Page 11: ...s in the center of the display one for each power tube If the amplifier is still cold the LEDs will initially illuminate yellow Please wait five to ten minutes After an additional 5 minutes the BIAS c...

Page 12: ...13 3 GETTING STARTED 3 7 Connection options overview...

Page 13: ...input for tuner etc Pos 3 Aux 1 RCA line level input for video etc Pos 4 Aux 2 RCA line level input for video etc Pos 5 CD 2 XLR line level input for CD SACD or similar Pos 6 The electronic BIAS meas...

Page 14: ...nit is switched on Protection Red LED lights up when the electronic protection system has switched off the amplifier due to an error see chapter 6 2 Soft start Lights up during the soft start process...

Page 15: ...MM MC input with Phono option AUX 1 RCA line level input for Video etc Tape Rec Record output for tape or DAT GND Ground connector for Turntable Front Channel Input for the front channel of a multich...

Page 16: ...n see chapter 10 You must switch off the V 70 Class A using the power switch before connecting and disconnecting the Black Box AC supply socket IEC socket with integrated fuse holder The fuse is locat...

Page 17: ...70 Class A is able to deliver up to 2 x 50 W RMS Output Power The slightly weaker tubes type KT 88 or 6550 can be used in the position LOW In this position the maximum output power is limited to 2 x...

Page 18: ...bes A fault in one of the preamp tubes which overloads the affected channel Once the protection system has cut in the only way you can turn the V 70 Class A back on is to turn the on off switch off an...

Page 19: ...plifier is on Eco on The Ecomode electronic is activated Ecomode is signal controlled after a 10 minute silence Ecomode switches in automatically The soft start LED 6 indicates that the Ecomode was tu...

Page 20: ...lated preamplifier output Pre Out Using with an active subwoofer The regulated preamplifier output is most commonly used to drive an active subwoofer The Pre Out is decoupled via a separate buffer to...

Page 21: ...e tubes are never exceeded in pentode mode weaker output tubes may also be considered Output tubes can be divided into two broad classes classic pentode output tubes for medium power amplifiers and mo...

Page 22: ...power tubes The BIAS is shown with three colored LEDs yellow for quiescent current too low green for correct quiescent current and red for quiescent current too high The display too low or too high in...

Page 23: ...allowed a longer warm up period You should check these tubes after about 20 minutes 7 5 Running in the tubes All OCTAVE equipment is subject to a 48 hour Long term quality test at the factory to burn...

Page 24: ...phono preamplifier incorporates active RIAA equalization with an active 2nd order subsonic filter The phono preamplifier uses semiconductor technology throughout The subsonic filter suppresses undesi...

Page 25: ...roves dynamic range separation depth soundstage size and articulation rendering the musical reproduction clearer throughout the entire frequency range The amplifier remains unaffected by mains variati...

Page 26: ...electrolytics The yellow LED indi cates that this procedure is taking place The discharge circuit also activates if the SBB connecting cable is accidentally removed This is to prevent the SBB maintain...

Page 27: ...eappears you have two grounded components connected to the V 70 Class A You must now unplug your components in reverse order to find out which of them is grounded Usually the hum will still appear eve...

Page 28: ...r fridges and 12V halogen lamps can produce strong radio interference when they turn on and off Depending on the wiring in your home this can result in clicks and pops in your loudspeakers To fix the...

Page 29: ...BIAS screws to the extreme right and leave them there If you have not been able to adjust the BIAS satisfactorily turn the adjuster screw back to its extreme left position Driver tube heater fault Wh...

Page 30: ...ection system to trip Should this happen switch the V 70 Class A off and replace the problem tube Faulty driver tube In very rare cases a problem with one of the driver tubes can cause the V 70 Class...

Page 31: ...4 ohms Power Selector High 2 x 50 W RMS Power Selector Low 2 x 25 W RMS Peak Power into 4 ohms Power Selector High 2 x 70 W Peak Power Selector Low 2 x 35 W Peak Into 8 Ohms Load the Output Power is...

Page 32: ...W idle 20 W in Ecomode Inrush current limitation to 600 W for 0 3 sec Weight 23 kg Mains fuse 230 240V 4 A slow blow H T4AH size 5 x 20 mm 115 240V 6 3 A slow blow H T6 3AH size 5 x 20 mm 100V 6 3 A...

Page 33: ...ss at 20 Hz is less than 0 2 dB Graph 2 Noise spectrum A A FFT SPECTRUM ANALYSIS V110SE 5V 4Ohm Noise spectrum at 1 kHz 5 W into 4 ohms there is no mains interference to be seen 50 Hz 200 V 100 Hz 70...

Page 34: ...cannot be checked but these will generally last for well over 10 years 4 Does the V 70 Class A have to have all of its tubes fitted In principle the V 70 Class A will also operate without tubes It is...

Page 35: ...octave de We reserve the right to alter and improve the specifications in pursuit of better OCTAVE logo is a registered trade mark of Andreas Hofmann Copyright by Andreas Hofmann Reproduction in whol...

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